Metal-punching appliance.



No. 645,323. Patented Mar. I3, I900. F. MCCARTY. METAL PUNCHIN G APPLIANCE.

(Apph at on fil an 23 1899) (No Model m VENTOH W071i WITNESSES m a E 3 5 A I I NITED ST TES PATENT Erica.

METAL-PUNCHING APPLIANCE.

SPECIFICATION forming part of Letters Patent No. 645,323, dated March 13, 1900.-

Application filed December 23, 1899. Serial No. 741,874.. (No model.)

.To all whom it may concern:

Be it known that I, FRANK MOCARTY, residing at Martins Ferry, in the county of Bel mont and State of Ohio, have invented a new and Improved Metal-Punching Appliance, of which the following is a specification.

This invention has for its purpose to provide a mechanism for punching metals; and it seeks to produce an appliance of this kind capable of being readily mounted upon an ordinary anvil and having among its characteristic features simplicity of construction, stability, effectiveness in operation, and including the no less desirable quality of preventing the punch from binding in the head in which it fits, and thereby admit of its being quickly withdrawn from engagement with the metal upon which it operates.

This invention comprehends generally a supporting-frame having means for securely holding it upon the anvil and having a peculiarly-constructed head or barrel which cooperates with the correspondingly shaped punch, so that as the punch is driven down by a suitable hammer its end will penetrate the metal with a rotary or twist action, and thereby cause the said punch to go through the metal more easily and produce a cleanercut hole than is possible by a straight or direct pressure.

Another feature of my invention lies in forming the framing of several sections,whereby the fitting of the several parts thereof is simplified, and also in adj ustably connecting the head portion of the frame to the stationary part thereof, whereby the punch-holding head can be set to suit the work.

In its subordinate features this invention consists in certain details and combination of parts, all of which will be first described and then specifically pointed out in the appended claims, reference being had to the accompanying drawings, in which- Figure 1 is a perspective view illustrating my invention as applied for use upon an anvil. Fig. 2 is a side elevation of the same, parts being in section. Fig. 3 is a transverse section taken practically on the line 3 3 of Fig. 2. Fig. 4 is a horizontal section taken on the line 4: 4 of Fig. 2. Fig. 5 is a horizontal section taken on the line 5 5 of Fig. 2. Fig. 6 is a similar view taken on the line 6 6 of Fig. 2. Fig. 7 is a sectional view ill ustrating a modified form of head hereinafter referred to.

In the practical construction my metalpunch appliance comprises a U shaped frame formed of two sections 1 2, the section 1 hav ing a base portion 1 terminating in a horizontally-disposed annular socket l adapted to receive the bottom die 3, presently again referred to, and the said base portion 1 is also formed with a pendent tang 1, adapted to fit the tool-receiving socket t on the anvil 4, as clearly shown in Fig. 1. The rear end 1 of the frame member 1 is curved upward and bent back in a vertical plane with the base portion 1, it also extending forwardly over the said portion 1 and forming, as it were, a rigid upper member I The member 1 has a countersink or reduced portion 1", formed with a plurality of horizontallyextended slots 5 5.

2 indicates the adjustable framesection, which has its inner end reduced to form a tang 2, adapted to fit the reduced portion 1? of the fixedly-held frame-section, and the said tang 2 has a plurality of vertical elongated slots 2 which register with the slots 5 5, as shown.

7 indicates bolts that pass through the slots 5 and 2 and 8 8 indicate nuts and washers engaging the said bolts and holding the parts secured to their adjusted positions.

The outer end of the member 2 terminates in a vertically-disposed barrel or sleeve 9, in which the punch 10 is operatively held in a manner presently described, said barrel portion 9 being disposed over the die 3, as clearly shown in Fig. 2.

The purpose in making the frame of two sections and adj ustably securing the section 2 is twofold-first, it simplifies the construction and fitting of the entire appliance, as bothportions of the frame, the end 2 and the barrel portion or head in the finishing of the appliance have to be bored out, and, secondly, it permits the barrel or head portion being adjusted both longitudinally and vertically to suit the work,such adjustment being readily made by properly setting the bolts 7 and nuts 8 and by moving the member2 in the direction or directions desired. 7

In the practical use of metal-punches in which the punch is held to move in a barrel or socket and caused to penetrate the metal by impact force it has been found that the punch is liable to stick in the barrel and be held from being readily drawn back, it frequently requiring a special means for driving back the punch. To avoid this objection, the punch-carrying body member 10 is formed with a worm-groove 3", and the said body is made of a diameter to admit of its moving freely through the barrel or head in which it slides.

The worm-groove 3, when the punch-head is in position for operation, engages with a set-screw 11, carried by the head 9, or, if desired, the said worm may be made to engage with a long thread 11, formed upon the inner face of the head, as illustrated in the modified form shown in Fig. '7. The object in providing the internal projection on the head, which may be either a set-screw or thread, as stated, is twofoldfirst, it causes the punch as it is being driven through the iron to go through the iron plate witha slight twist, thus making it penetrate the plate more easily and making a cleaner hole, it being understood that the worm upon the punch stock or head is of a sufficient pitch to prevent any binding or undue strain upon the internal projection of the head or barrel; secondly, by providing the stock or head of the punch with a groove, as described, and terminating the upper end of the punch-stock with a non-circular projection the same is adapted to receive a suitable handle, as indicated in Fig. 2, whereby the punch may be rotated in a reverse direction, and thereby caused to instantly move upward to bring the punch proper, 12, out of engagement with the plate it is intended to engage, thereby providing a simple and effective means fordrawing back the punch after it has been driven through the iron.

The stock or headportion of the punch has a suitable socket in the bottom to receive the different-sized punches, and the said punches are held in position by means of a beveledheaded set-screw, as clearly shown in Fig. 3.

The die 3 has the usual punch-receiving aperture, and the upper face of the said die is preferably beveled, as illustrated.

I am aware that mechanisms for punching metal have heretofore been provided in which the punch-stock is provided with external screwways and adapted to engage threaded sockets. So far as I know, however, the threads on the punch-stocks have been so arranged that the punchis forced downward by screw action. My invention differentiates from such form of punch mechanisms in that the punch is intended to be forced down by hitting it with a heavy hammer, the external thread in my form of punch being principally employed to cause the punch to quickly rise up from engagement with the metal and preventing its binding within the head or barrel.

From the foregoing it will be readily seen that my appliance forms an addition to the ordinary kit of blacksmiths implements, as it is intended for use particularly on the ordinary anvil, and by forming the frame in two sections, as described, the head or barrel can be set vertically or longitudinally to suit the work. Furthermore, such construction of frame admits of the appliance being readily made without requiring any special machinery for stamping or forming the parts.

By forming the frame in the manner stated.

and providing the punch-stock with means for receiving a handle said handle can also be utilized for holding the upper member of the frame down against spring action, whereby to keep the punch solid upon the metal to be punched, and thereby insure a solid blow when the punch is struck by the hammer.

Having thus described my invention, what I claim, and desire to secure by Letters Pat cut, is

1. An appliance for the purposes described, comprising a frame having a base portion adapted to rest upon an anvil or other like support and having an arm extended over the base portion the outer end of which termi nates in a vertical barrel; a punch-holder held within the barrel and adapted to freely move down through the barrel by hammering it, said punch and barrel having' coacting por= tions operating to impart a slight rotary motion to the punch when it is driven down by hammering and to quickly cause the said punch to rise up out of the barrel when it, the punch, is rotated by external force, as speci= fied.

2. An appliance of the character described, comprising a supporting-frame having a base portion provided with a tang to fit the ordinary anvil and having an integral part 1, bcnt over the base portion, and a member 2, forming a continuation of the part 1 said member 2 being detachably secured upon the member 1 and having a vertical and longitudinal adjustment thereon, the outer end of the member 2, terminating in a vertical barrel, said barrel having an internal-projecting member and a punch-holder having an external spiral groove, said holder being freely movable vertically within the barrel and adapted to engage the internal projection in the barrel, said external spiral groove of the punch being of such pitch as to permit of a free vertical movement of the punch as it is driven upon by hammering, as hereinbefore described.

3. An improved metal-punchingappliance, comprising a frame consisting of a base member, the outer end of which terminates in a die-receiving socket, the inner end of which is bent upon itself, and the extremity thereof formed with longitudinally-extending slots, the detachable member having a portion adapted to engage with the slotted end of the other member and having elongated slot-s adapted to register with the slots in the fixcally movable in the said barrel, all being aredly-held frame portion, said slots being proranged substantially as shown and for the jected at right angles to the slots in the said purposes described.

fixedly-held portion; the bolts and nuts for FRANK MOOARTY. securing the two members together; the outer Witnesses: end of the adjustable portion terminating in GEO. G. SEDGWICK,

a barrel, and a punch-holding stock verti- I F. R. SEDGWIOK. 

